docs: def _maybe_decompress_body(self):
          """Attempt to decompress the message body passed in using the named
          compression module, if specified.
  
          :rtype: bytes
  
          """
          if self.content_encoding:
              if self.content_encoding in self._CODEC_MAP.keys():
                  module_name = self._CODEC_MAP[self.content_encoding]
                  self.logger.debug('Decompressing with %s', module_name)
                  module = self._maybe_import(module_name)
                  return module.decompress(self._message.body)
              self.logger.debug('Unsupported content-encoding: %s',
                                self.content_encoding)
          return self._message.body